Inner circumference: Approximately 15cm. Slight variations may occur. * If you would like to change the size (up to 17cm free of charge), please let me know after purchase. Larimar: 8mm Rondel Cracked Quartz: 6mm Lavender Amethyst: 6mm Aquamarine: 4.5mm White Jade: 6mm Onyx (64-faceted cut): 8mm Double-strand Ope-ron rubber * The knots in the rubber are not secured with adhesive. If they come loose, gently pull them back in from the opposite side of the stone. The stones may have small scratches, inclusions, color variations, dents, and natural cracks. This is handmade by an amateur, so please refrain from purchasing if you are looking for perfection. 35